Device for detecting movements of an object surface having a prism for uniformly distribution of light
US7034278B2 · kind B2 · utility
4Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2002 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Sep 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03549
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A movement detection device, intended particularly for a computer mouse or a hand-held scanner, includes a light source (7) associated with a prism (8) having a non-uniformly plane reflective face. One thus obtains an as uniform as possible illumination of the field (4) of the object whose movements will be detected. An optical system (9) inserted between the field and the optoelectronic sensor (13) fixed to a printed circuit board (6) is mounted on a support (12) fixed to the board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.